May 2015 - Pharo-users - lists.pharo.org

Next Pharo sprint & Moose dojo
by Jean-Christophe Bach May 21, 2015

May 21, 2015

Hello Pharoers, We propose a Pharo sprint / Moose dojo on Friday, 22nd May, starting at 10:00am. (Local Time Lille). It will be at the Inria Lille, Building B, third floor (RMoD offices). Remotely, you can join us on the official IRC channel #pharo on irc.freenode.net server. During the sprint, we will try to synchronize local and remote Pharo sprinters. As the building is not open to the public, please contact us before if you plan to come. JC

4 10

Spec TreeModel dynamic contents
by webwarrior May 21, 2015

May 21, 2015

I want to make a tree using TreeModel that reacts to changes in underlying data - when an item changes, tree node for that item should update its state (recompute its children, etc.). Rebuilding the whole tree is ok, as long as selections and collapsed/expanded state of nodes are preserved. Using #updateTree however resets all these things. And there is no easy way to save/load them either - #selectedItems/#selectedItems: work with TreeNode instances that get reset, and collapsed/expanded states of nodes are simply unaccessible from TreeModel. I also tried subclassing TreeNodeModel. But I found no way to update underlying UI widget. There is a huge mess involving TreeNodeModel, MorphicTreeNodeAdapter, SpecTreeNodeModel, and MorphTreeNodeMorph. The only option left is to extract all needed information from TreeNodeModel hierarchy (preserving the tree structure) before update, and then try to reapply it to newly created hierarchy. Or is there an easier way? -- View this message in context: http://forum.world.st/Spec-TreeModel-dynamic-contents-tp4827440.html Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

4 7

Alt-tab between windows
by Torsten Bergmann May 20, 2015

May 20, 2015

>I dunno if this is useful to anyone, but I was rolling around concepts in >my mind and this is something I came up with: >... Reminds me a lot onto the old Whsiker browser we had back in the days in Squeak Smalltalk: http://www.fit.vutbr.cz/study/courses/OMP/public/software/sqcdrom2/Packages… Havent done much with Squeak after we forked into Pharo but it may be that it is still running in a recent Squeak version out of the box. But one can try squeak.org or ask on squeak-dev list. Bye T.

1 0

Smalltalkhub password reset
by mtk May 20, 2015

May 20, 2015

Hi, I lost my password for smalltalkhub. I read some older messages in the interwebs that one has to directly ask Nicolas Petton for resetting the password, but this didn't work. Is there another way? Maybe a password reset mechanism would be fine... :-) Best Marcus -- View this message in context: http://forum.world.st/Smalltalkhub-password-reset-tp4827089.html Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

5 8

Spec - Columns Containing Rows Containing Columns
by Craig Johnson May 19, 2015

May 19, 2015

Hi, Spec has me tearing my hair out again. I'm using a composed layout with two columns in it. In the second column I'd like to place some rows which in turn contain columns. There does not seem to be any way to do this. Everthing that I try only renders one of the two main columns. Guidance would be spreciated. defaultSpec <spec: #default> ^SpecLayout composed newColumn: [ :tcol | tcol newRow:[:trow | trow add: #lblFolder ] height: 30. ]; newColumn: [ :tcol | tcol newRow:[:trow | trow newColumn: [ :tcol2 | tcol2 add: #ddlfolder]; newColumn: [ :tcol2 | tcol2 add: #txtFolder]. ] height: 30. ].

3 4

Silent compilation
by Sergio Fedi May 19, 2015

May 19, 2015

Hi guys, What is a silent compilation? When should it be used?

2 2

Re: [Pharo-users] Alt-tab between windows
by Sean P. DeNigris May 19, 2015

May 19, 2015

jtuchel wrote > once you reached an artefact to read or edit, there is no need for the > navigation to cover a lot of space on screen. Multiplied by the number of > open browsers It's Morphic - pull up the halos and drag the source pane out ;) p.s. kidding... but not. Although it's not exactly that simple because a) you'll have to click a few extra times because the frontmost Morphs are not locked, and b) the MultipleMethodsEditor will initially fill the world because it is #spaceFill, but that could probably be addressed without too much effort. We always complain about Morphic, but forget how much power is hiding behind our GUI ----- Cheers, Sean -- View this message in context: http://forum.world.st/Alt-tab-between-windows-tp4826593p4827312.html Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

1 0

Displaying pictures using Athens
by Christopher Coat May 19, 2015

May 19, 2015

Hi everybody, Iâm currently creating a small app to display images and move them on a screen using Athens. I have all my image loaded on start and I use a loop to clear the screen and redraw all the elements (on different place and angle) every frames. The problem is that with morph, everything is fine, but as soon as I place a picture on a morph the FPS drop down. Even if the picture is a small one. Does anybody have faced the same issue ? Or is there any better way to do it ? Thanks Chris

2 3

Using VirtualGPU
by Serge Stinckwich May 19, 2015

May 19, 2015

Dear all, just to let you know, Cheikhou (in CC) is starting a student internship in my lab. He will work on Epidemiology Modelling with KENDRICK: http://ummisco.github.io/kendrick/ the platform that we are developing in order to analyse and visualise diseases models behaviours. We would like first to implement a GPU version of the Gillespie Stochastic Simulation Algorithm (GSSA): http://en.wikipedia.org/wiki/Gillespie_algorithm and after that also implement SPH simulations: https://en.wikipedia.org/wiki/Smoothed-particle_hydrodynamics We are looking at the code of OpenCL and VirtualGPU done by Ronnie. What we have understand until now : - OpenCL package : low-level stuff to be able to interface OpenCL kernels with Pharo - VirtualGPU: high-level API on top of OpenCL in order to ease the task of people who wants to use OpenCL. VirtualGPU provide high-level operations on matrix and image at the moment. @Ronie: What is not clear at the moment in our mind : when you build a VirtualGPU program with the DSL, do you have the overhead of communications every time you execute a VirtualGPU instruction or all the the instructions are sent at the same time and run on the GPU ? In our context, for building a GSSA algorithm, I guess we just have to combine same VGPU instructions (matrix computations) but for doing SPH simulations, we will have to provide our own instructions. Is there any documentation in order to add own kernel and instructions ? I know that others guys at INRIA (StÃ©phane ?) are interested by GPU. Is it possible to join our effort to share what we are doing ? Regards, -- Serge Stinckwich UCBN & UMI UMMISCO 209 (IRD/UPMC) Every DSL ends up being Smalltalk http://www.doesnotunderstand.org/

3 3

Re: [Pharo-users] Alt-tab between windows
by Avdi Grimm May 19, 2015

May 19, 2015

I gotta say, I was *very* happy to see the Spotter in Pharo 4. This approach, the grand unified auto-completing fuzzy find-by-anything box, is one of the greatest programming UX advances in recent memory. There's a reason there's now a version of it in every editor or IDE I know of. That's not to say there's no place for a Browser approach. But what's interesting to me is that I think the Spotter represents the 80% case. 80% of the time, we have a good idea of what we're looking for and we just want to get to it quickly. Browsers are more helpful for the 20% of the time when we're new to the code and we're exploring. On Tue, May 19, 2015 at 12:42 AM Joachim Tuchel <jtuchel(a)objektfabrik.de> wrote: > We're in agreement here. It is nog about the panes per se. It's about the > fact that once you reached an artefact to read or edit, there is no need > for the navigation to cover a lot of space on screen. Multiplied by the > number of open browsers. Until you commence your journey through your code. > > Then there is the problem of navigation being much more than just packages > and class hierarchies. There is the question of why and how did I get here? > That area is uncovered in most IDEs - not only Smalltalk. > > Another problem area is the longevity of a need to have some artefact > open. How often do we close 10, 15, 20 inspectors at once, because we don't > need them any more? When we look for the place where something started, we > travel from implementor to implementor, via some senders until we finally > get to where we can answer our question af hand. Sometimes we reach a dead > end, need to go back a step or two and try another branch. But does it > really mean we need each stop of the path as an open window? Forever? Or > are there better ways to navigate? > > I am getting so off-topic it hurts, but these questions need an answer, > and the Smalltalk community should be one that can solve them much more > easily than others because our language lets us concentrate on the problem. > > Joachim

1 0